Subject: Re: [Healeys] Speedo Drive Thread Size?

From: john harper via Healeys <[email-masked]>
Date: Sun, 8 Aug 2021 20:32:52 +0100

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Harold

I can confirm that in my documents there is a section British Standard
Cycle thread. Diameters are from 1/8" to 3/4", the largest. TPI is from 40
thru 26. It is a 60-degree form rounded on top and inside.

It first became a recognized standard in 1902

Best regards

On Sun, 8 Aug 2021 at 18:45, Henry G Leach via Healeys <
[email-masked]> wrote:

> Harold-you can get these parts at: https://britishfasteners.com/
>
> They have all the British sizes and tools to boot including BSC!  Hank
>
> -----------------------------------------
> From: "Harold Manifold via Healeys"
> To: "Ken Fleming via Healeys"
> Cc:
> Sent: Sunday August 8 2021 9:27:29AM
> Subject: [Healeys] Speedo Drive Thread Size?
>
> Just when I thought I had a handle Whitworth, BSPP, BSPT, SAE, UNF, etc.
> along comes BSC (British Standard Cycle). The threads on the transmission
> speedo drive and the angle drive are not the best and could use a
> refreshed. The pitch is 26 TPI and the diameter is =C2=BE=E2=80=9D as bes=
t I can
> measure. After searching Google the closest match I could find is 3/4" X =
26
> TPI BSC.
>
>
>
> I have never heard of British Standard Cycle before. Can anyone confirm i=
f
> this is the tread size?
>
>
>
> Harold
>
>
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation  $12.75
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<div dir=3D"ltr">Harold<div><br></div><div>I can confirm that in my documen=
ts there is a section British Standard Cycle thread. Diameters are from 1/8=
&quot; to 3/4&quot;, the largest. TPI is from 40 thru 26. It is a 60-degree=
 form rounded on top and inside.</div><div><br></div><div>It first became a=
 recognized standard in 1902</div><div><br></div><div>Best regards</div></d=
iv><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On =
Sun, 8 Aug 2021 at 18:45, Henry G Leach via Healeys &lt;<a href=3D"mailto:h=
[email-masked]">[email-masked]</a>&gt; wrote:<br></div><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:=
1px solid rgb(204,204,204);padding-left:1ex"><div>Harold-you can get these =
parts at:=C2=A0<a href=3D"https://britishfasteners.com/" target=3D"_blank">=
https://britishfasteners.com/</a><div><br></div><div>They have all the Brit=
ish sizes and tools to boot including BSC!=C2=A0 Hank<br><br><div></div><p>=
-----------------------------------------</p>From: &quot;Harold Manifold vi=
a Healeys&quot; <u></u><br>To: &quot;Ken Fleming via Healeys&quot;<br>Cc: <=
br>Sent: Sunday August 8 2021 9:27:29AM<br>Subject: [Healeys] Speedo Drive =
Thread Size?<br><br>
<div>
<p class=3D"MsoNormal">Just when I thought I had a handle Whitworth,
BSPP, BSPT, SAE, UNF, etc. along comes BSC (British Standard
Cycle). The threads on the transmission speedo drive and the angle
drive are not the best and could use a refreshed. The pitch is 26
TPI and the diameter is =C2=BE=E2=80=9D as best I can measure. After search=
ing
Google the closest match I could find is 3/4&quot; X 26 TPI BSC.</p>
<p class=3D"MsoNormal">=C2=A0</p>
<p class=3D"MsoNormal">I have never heard of British Standard Cycle
before. Can anyone confirm if this is the tread size?</p>
<p class=3D"MsoNormal">=C2=A0</p>
<p class=3D"MsoNormal">Harold</p>
<p class=3D"MsoNormal">=C2=A0</p>
</div>
<u></u></div></div>
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</blockquote></div>

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From: Harold Manifold via Healeys <[email-masked]>
Date: Sun, 8 Aug 2021 16:33:14 -0700

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<html xmlns:o=3D"urn:schemas-microsoft-com:office:office" xmlns:w=3D"urn:sc=
hemas-microsoft-com:office:word" xmlns:m=3D"http://schemas.microsoft.com/of=
fice/2004/12/omml" xmlns=3D"http://www.w3.org/TR/REC-html40"><head><meta ht=
tp-equiv=3DContent-Type content=3D"text/html; charset=3Dutf-8"><meta name=
=3DGenerator content=3D"Microsoft Word 15 (filtered medium)"><style><!--
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--></style></head><body lang=3DEN-US link=3Dblue vlink=3D"#954F72" style=3D=
'word-wrap:break-word'><div class=3DWordSection1><p class=3DMsoNormal>Thank=
s for all your replies. I will add BSC to my fastener list. I will see if I=
 can locate a die.</p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3D=
MsoNormal>Harold<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><d=
iv style=3D'mso-element:para-border-div;border:none;border-top:solid #E1E1E=
1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal style=3D'border:non=
e;padding:0in'><b>From: </b><a href=3D"mailto:[email-masked]">john har=
per</a><br><b>Sent: </b>Sunday, August 8, 2021 12:33 PM<br><b>To: </b><a hr=
ef=3D"mailto:[email-masked]">Hank Leach</a><br><b>Cc: </b><a href=3D"m=
ailto:[email-masked]">Harold Manifold</a>; <a href=3D"mailto:healeys@au=
tox.team.net">[email-masked]</a><br><b>Subject: </b>Re: [Healeys] S=
peedo Drive Thread Size?</p></div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p=
><div><p class=3DMsoNormal>Harold</p><div><p class=3DMsoNormal><o:p>&nbsp;<=
/o:p></p></div><div><p class=3DMsoNormal>I can confirm that in my documents=
 there is a section British Standard Cycle thread. Diameters are from 1/8&q=
uot; to 3/4&quot;, the largest. TPI is from 40 thru 26. It is a 60-degree f=
orm rounded on top and inside.</p></div><div><p class=3DMsoNormal><o:p>&nbs=
p;</o:p></p></div><div><p class=3DMsoNormal>It first became a recognized st=
andard in 1902</p></div><div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p></di=
v><div><p class=3DMsoNormal>Best regards</p></div></div><p class=3DMsoNorma=
l><o:p>&nbsp;</o:p></p><div><div><p class=3DMsoNormal>On Sun, 8 Aug 2021 at=
 18:45, Henry G Leach via Healeys &lt;<a href=3D"mailto:[email-masked].=
net">[email-masked]</a>&gt; wrote:</p></div><blockquote style=3D'bo=
rder:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-=
left:4.8pt;margin-right:0in'><div><p class=3DMsoNormal>Harold-you can get t=
hese parts at:&nbsp;<a href=3D"https://britishfasteners.com/">https://briti=
shfasteners.com/</a></p><div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p></di=
v><div><p class=3DMsoNormal style=3D'margin-bottom:12.0pt'>They have all th=
e British sizes and tools to boot including BSC!&nbsp; Hank</p><p>---------=
--------------------------------</p><p class=3DMsoNormal style=3D'margin-bo=
ttom:12.0pt'>From: &quot;Harold Manifold via Healeys&quot; <br>To: &quot;Ke=
n Fleming via Healeys&quot;<br>Cc: <br>Sent: Sunday August 8 2021 9:27:29AM=
<br>Subject: [Healeys] Speedo Drive Thread Size?</p><div><p class=3DMsoNorm=
al style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Just when I=
 thought I had a handle Whitworth, BSPP, BSPT, SAE, UNF, etc. along comes B=
SC (British Standard Cycle). The threads on the transmission speedo drive a=
nd the angle drive are not the best and could use a refreshed. The pitch is=
 26 TPI and the diameter is =C2=BE=E2=80=9D as best I can measure. After se=
arching Google the closest match I could find is 3/4&quot; X 26 TPI BSC.</p=
><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-al=
t:auto'>&nbsp;</p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso=
-margin-bottom-alt:auto'>I have never heard of British Standard Cycle befor=
e. Can anyone confirm if this is the tread size?</p><p class=3DMsoNormal st=
yle=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;</p><p cla=
ss=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'=
>Harold</p><p class=3DMsoNormal style=3D'mso-margin-top-alt:auto;mso-margin=
-bottom-alt:auto'>&nbsp;</p></div></div></div></blockquote></div><p class=
=3DMsoNormal style=3D'mso-margin-top-alt:0in;margin-right:0in;margin-bottom=
:12.0pt;margin-left:4.8pt'>_______________________________________________<=
br>Support Team.Net <a href=3D"http://www.team.net/donate.html">http://www.=
team.net/donate.html</a><br>Suggested annual donation&nbsp; $12.75<br><br>A=
rchive: <a href=3D"http://www.team.net/pipermail/healeys">http://www.team.n=
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html>=

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[email-masked]

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---

From: Bob Haskell via Healeys <[email-masked]>
Date: Sun, 8 Aug 2021 20:14:29 -0400

Harold,

As has been pointed out in separate emails, there are two standards that 
include 3/4" dia with 26 TPI. British Standard Cycle with thread angle 
of 60 degrees and British Standard Brass with a thread angle of 55 
degrees.  Since the speedo drive is brass I would suspect the latter, 
but I don't have one handy to check.

Cheers,

Bob Haskell
Austin Healey 3000 BN7/BT7 registrar

On 8/8/21 7:33 PM, Harold Manifold via Healeys wrote:
>
> Thanks for all your replies. I will add BSC to my fastener list. I 
> will see if I can locate a die.
>
> Harold
>
> *From: *john harper <mailto:[email-masked]>
> *Sent: *Sunday, August 8, 2021 12:33 PM
> *To: *Hank Leach <mailto:[email-masked]>
> *Cc: *Harold Manifold <mailto:[email-masked]>; 
> [email-masked] <mailto:[email-masked]>
> *Subject: *Re: [Healeys] Speedo Drive Thread Size?
>
> Harold
>
> Cycle thread. Diameters are from 1/8" to 3/4", the largest. TPI is 
> from 40 thru 26. It is a 60-degree form rounded on top and inside.
>
> On Sun, 8 Aug 2021 at 18:45, Henry G Leach via Healeys 
> <[email-masked] <mailto:[email-masked]>> wrote:
>
>     <https://britishfasteners.com/>
>
>     Just when I thought I had a handle Whitworth, BSPP, BSPT, SAE,
>     UNF, etc. along comes BSC (British Standard Cycle). The threads on
>     the transmission speedo drive and the angle drive are not the best
>     and could use a refreshed. The pitch is 26 TPI and the diameter is
>     ¾” as best I can measure. After searching Google the closest match
>     I could find is 3/4" X 26 TPI BSC.
>
>     I have never heard of British Standard Cycle before. Can anyone
>     confirm if this is the tread size?
>
>     Harold
>
> <http://www.team.net/donate.html>
> <http://www.team.net/pipermail/healeys> http://autox.team.net/archive 
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From: warthodson--- via Healeys <[email-masked]>
Date: Mon, 9 Aug 2021 14:27:07 +0000 (UTC)

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Content-Transfer-Encoding: quoted-printable

Bob,If you had one available, how would you go about checking the thread an=
gle?=C2=A0Gary Hodson
-----Original Message-----
From: Bob Haskell via Healeys <[email-masked]>
To: Harold Manifold <[email-masked]>; john harper <[email-masked]>=
; Hank Leach <[email-masked]>
Cc: [email-masked] <[email-masked]>
Sent: Sun, Aug 8, 2021 7:14 pm
Subject: Re: [Healeys] Speedo Drive Thread Size?

Harold,

As has been pointed out in separate emails, there are two standards that=20
include 3/4" dia with 26 TPI. British Standard Cycle with thread angle=20
of 60 degrees and British Standard Brass with a thread angle of 55=20
degrees.=C2=A0 Since the speedo drive is brass I would suspect the latter,=
=20
but I don't have one handy to check.

Cheers,

Bob Haskell

On 8/8/21 7:33 PM, Harold Manifold via Healeys wrote:
>
> Thanks for all your replies. I will add BSC to my fastener list. I=20
> I can confirm that in my documents there is a section British Standard=20
> Cycle thread. Diameters are from 1/8" to 3/4", the largest. TPI is=20
> On Sun, 8 Aug 2021 at 18:45, Henry G Leach via Healeys=20
>
>=C2=A0 =C2=A0 Harold-you can get these parts at: https://britishfasteners.=
com/
>=C2=A0 =C2=A0 <https://britishfasteners.com/>
>
>=C2=A0 =C2=A0 They have all the British sizes and tools to boot including =
BSC!=C2=A0 Hank
>
>=C2=A0 =C2=A0 -----------------------------------------
>
>=C2=A0 =C2=A0 From: "Harold Manifold via Healeys"
>=C2=A0 =C2=A0 To: "Ken Fleming via Healeys"
>=C2=A0 =C2=A0 Cc:
>=C2=A0 =C2=A0 Sent: Sunday August 8 2021 9:27:29AM
>=C2=A0 =C2=A0 Subject: [Healeys] Speedo Drive Thread Size?
>
>=C2=A0 =C2=A0 Just when I thought I had a handle Whitworth, BSPP, BSPT, SA=
E,
>=C2=A0 =C2=A0 UNF, etc. along comes BSC (British Standard Cycle). The thre=
ads on
>=C2=A0 =C2=A0 the transmission speedo drive and the angle drive are not th=
e best
>=C2=A0 =C2=A0 and could use a refreshed. The pitch is 26 TPI and the diame=
ter is
>=C2=A0 =C2=A0 =C2=BE=E2=80=9D as best I can measure. After searching Googl=
e the closest match
>=C2=A0 =C2=A0 I could find is 3/4" X 26 TPI BSC.
>
>=C2=A0 =C2=A0 I have never heard of British Standard Cycle before. Can any=
one
>=C2=A0 =C2=A0 confirm if this is the tread size?
>
>=C2=A0 =C2=A0 Harold
>
> Support Team.Net http://www.team.net/donate.html=20
> Suggested annual donation=C2=A0 $12.75
>
> Archive: http://www.team.net/pipermail/healeys=20
> <http://www.team.net/pipermail/healeys> http://autox.team.net/archive=20
> http://autox.team.net/mailman/listinfo/healeys=20
> Unsubscribe/Manage:=20
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>
> Archive: http://www.team.net/pipermail/healeys http://autox.team.net/arch=
ive
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[email-masked]

Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archiv=
e

[email-masked]

[email-masked]

------=_Part_518858_1259271303.1628519227677
Content-Transfer-Encoding: quoted-printable

<div style=3D"color:black;font: 12pt Comic Sans MS, sans-serif;">Bob,
<div>If you had one available, how would you go about checking the thread a=
ngle?&nbsp;</div>

<div>Gary Hodson</div>

<div><br>

<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black"><font=
 size=3D"2">-----Original Message-----<br>
From: Bob Haskell via Healeys &lt;[email-masked]&gt;<br>
To: Harold Manifold &lt;[email-masked]&gt;; john harper &lt;ah100tech@g=
mail.com&gt;; Hank Leach &lt;[email-masked]&gt;<br>
Cc: [email-masked] &lt;[email-masked]&gt;<br>
Sent: Sun, Aug 8, 2021 7:14 pm<br>
Subject: Re: [Healeys] Speedo Drive Thread Size?<br>
<br>

<div dir=3D"ltr">Harold,<br clear=3D"none"><br clear=3D"none">As has been p=
ointed out in separate emails, there are two standards that <br clear=3D"no=
ne">include 3/4" dia with 26 TPI. British Standard Cycle with thread angle =
<br clear=3D"none">of 60 degrees and British Standard Brass with a thread a=
ngle of 55 <br clear=3D"none">degrees.&nbsp; Since the speedo drive is bras=
s I would suspect the latter, <br clear=3D"none">but I don't have one handy=
 to check.<br clear=3D"none"><br clear=3D"none">Cheers,<br clear=3D"none"><=
br clear=3D"none">Bob Haskell<br clear=3D"none">Austin Healey 3000 BN7/BT7 =
registrar<br clear=3D"none"><br clear=3D"none">On 8/8/21 7:33 PM, Harold Ma=
nifold via Healeys wrote:<br clear=3D"none">&gt;<br clear=3D"none">&gt; Tha=
nks for all your replies. I will add BSC to my fastener list. I <br clear=
=3D"none">&gt; will see if I can locate a die.<br clear=3D"none">&gt;<br cl=
ear=3D"none">&gt; Harold<br clear=3D"none">&gt;<br clear=3D"none">&gt; *Fro=
m: *john harper &lt;mailto:<a shape=3D"rect" ymailto=3D"mailto:ah100tech@gm=
ail.com" href=3D"mailto:[email-masked]">[email-masked]</a>&gt;<br=
 clear=3D"none">&gt; *Sent: *Sunday, August 8, 2021 12:33 PM<br clear=3D"no=
ne">&gt; *To: *Hank Leach &lt;mailto:<a shape=3D"rect" ymailto=3D"mailto:gr=
[email-masked]" href=3D"mailto:[email-masked]">[email-masked]<=
/a>&gt;<br clear=3D"none">&gt; *Cc: *Harold Manifold &lt;mailto:<a shape=3D=
"rect" ymailto=3D"mailto:[email-masked]" href=3D"mailto:manifold@telus.=
net">[email-masked]</a>&gt;; <br clear=3D"none">&gt; <a shape=3D"rect" =
ymailto=3D"mailto:[email-masked]" href=3D"mailto:[email-masked]=
.net">[email-masked]</a> &lt;mailto:<a shape=3D"rect" ymailto=3D"ma=
ilto:[email-masked]" href=3D"mailto:[email-masked]">healeys=
@autox.team.net</a>&gt;<br clear=3D"none">&gt; *Subject: *Re: [Healeys] Spe=
edo Drive Thread Size?<br clear=3D"none">&gt;<br clear=3D"none">&gt; Harold=
<br clear=3D"none">&gt;<br clear=3D"none">&gt; I can confirm that in my doc=
uments there is a section British Standard <br clear=3D"none">&gt; Cycle th=
read. Diameters are from 1/8" to 3/4", the largest. TPI is <br clear=3D"non=
e">&gt; from 40 thru 26. It is a 60-degree form rounded on top and inside.<=
br clear=3D"none">&gt;<br clear=3D"none">&gt; It first became a recognized =
standard in 1902<br clear=3D"none">&gt;<br clear=3D"none">&gt; Best regards=
<br clear=3D"none">&gt;<br clear=3D"none">&gt; On Sun, 8 Aug 2021 at 18:45,=
 Henry G Leach via Healeys <br clear=3D"none">&gt; &lt;<a shape=3D"rect" ym=
ailto=3D"mailto:[email-masked]" href=3D"mailto:[email-masked]=
et">[email-masked]</a> &lt;mailto:<a shape=3D"rect" ymailto=3D"mail=
to:[email-masked]" href=3D"mailto:[email-masked]">healeys@a=
utox.team.net</a>&gt;&gt; wrote:<br clear=3D"none">&gt;<br clear=3D"none">&=
gt;&nbsp; &nbsp;  Harold-you can get these parts at: <a shape=3D"rect" href=
=3D"https://britishfasteners.com/" target=3D"_blank">https://britishfastene=
rs.com/</a><br clear=3D"none">&gt;&nbsp; &nbsp;  &lt;<a shape=3D"rect" href=
=3D"https://britishfasteners.com/" target=3D"_blank">https://britishfastene=
rs.com/</a>&gt;<br clear=3D"none">&gt;<br clear=3D"none">&gt;&nbsp; &nbsp; =
 They have all the British sizes and tools to boot including BSC!&nbsp; Han=
k<br clear=3D"none">&gt;<br clear=3D"none">&gt;&nbsp; &nbsp;  -------------=
----------------------------<br clear=3D"none">&gt;<br clear=3D"none">&gt;&=
nbsp; &nbsp;  From: "Harold Manifold via Healeys"<br clear=3D"none">&gt;&nb=
sp; &nbsp;  To: "Ken Fleming via Healeys"<br clear=3D"none">&gt;&nbsp; &nbs=
p;  Cc:<br clear=3D"none">&gt;&nbsp; &nbsp;  Sent: Sunday August 8 2021 9:2=
7:29AM<br clear=3D"none">&gt;&nbsp; &nbsp;  Subject: [Healeys] Speedo Drive=
 Thread Size?<br clear=3D"none">&gt;<br clear=3D"none">&gt;&nbsp; &nbsp;  J=
ust when I thought I had a handle Whitworth, BSPP, BSPT, SAE,<br clear=3D"n=
one">&gt;&nbsp; &nbsp;  UNF, etc. along comes BSC (British Standard Cycle).=
 The threads on<br clear=3D"none">&gt;&nbsp; &nbsp;  the transmission speed=
o drive and the angle drive are not the best<br clear=3D"none">&gt;&nbsp; &=
nbsp;  and could use a refreshed. The pitch is 26 TPI and the diameter is<b=
r clear=3D"none">&gt;&nbsp; &nbsp;  =C2=BE=E2=80=9D as best I can measure. =
After searching Google the closest match<br clear=3D"none">&gt;&nbsp; &nbsp=
;  I could find is 3/4" X 26 TPI BSC.<br clear=3D"none">&gt;<br clear=3D"no=
ne">&gt;&nbsp; &nbsp;  I have never heard of British Standard Cycle before.=
 Can anyone<br clear=3D"none">&gt;&nbsp; &nbsp;  confirm if this is the tre=
ad size?<br clear=3D"none">&gt;<br clear=3D"none">&gt;&nbsp; &nbsp;  Harold=
<br clear=3D"none">&gt;<br clear=3D"none">&gt; ____________________________=
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[email-masked]

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---

From: warthodson--- via Healeys <[email-masked]>
Date: Mon, 9 Aug 2021 15:13:46 +0000 (UTC)

--===============3360141091146332910==
	boundary="----=_Part_524944_2031714073.1628522026205"

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-----Original Message-----
From: Bob Haskell via Healeys <[email-masked]>
To: Harold Manifold <[email-masked]>; john harper <[email-masked]>=

Harold,

Cheers,

Bob Haskell

------=_Part_524944_2031714073.1628522026205
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<div style="color:black;font: 12pt Comic Sans MS, sans-serif;">
<div style="font-family:arial,helvetica;font-size:10pt;color:black"><font size="2"><br>

<div id="yiv8655725873">
<div>
<div style="color:black;font:12pt Comic Sans MS, sans-serif;">Bob,

<div>If you had one available, how would you go about checking the thread angle?&nbsp;</div>

<div>Gary Hodson</div>

<div class="yiv8655725873yqt3644672948" id="yiv8655725873yqt07661">
<div><br clear="none">

<div style="font-family:arial, helvetica;font-size:10pt;color:black;"><font size="2">-----Original Message-----<br clear="none">
From: Bob Haskell via Healeys &lt;[email-masked]&gt;<br clear="none">
To: Harold Manifold &lt;[email-masked]&gt;; john harper &lt;[email-masked]&gt;; Hank Leach &lt;[email-masked]&gt;<br clear="none">
Cc: [email-masked] &lt;[email-masked]&gt;<br clear="none">
Sent: Sun, Aug 8, 2021 7:14 pm<br clear="none">
Subject: Re: [Healeys] Speedo Drive Thread Size?<br clear="none">
<br clear="none">

</font>
<div dir="ltr">Harold,<br clear="none"><br clear="none">As has been pointed out in separate emails, there are two standards that <br clear="none">include 3/4" dia with 26 TPI. British Standard Cycle with thread angle <br clear="none">of 60 degrees and British Standard Brass with a thread angle of 55 <br clear="none">degrees.&nbsp; Since the speedo drive is brass I would suspect the latter, <br clear="none">but I don't have one handy to check.<br clear="none"><br clear="none">Cheers,<br clear="none"><br clear="none">Bob Haskell<br clear="none">Austin Healey 3000 BN7/BT7 registrar<br clear="none"><br clear="none">
<div class="yiv8655725873yqt9871142070" id="yiv8655725873yqtfd26944"><br clear="none"></div>

</div>

</div>

</div>
</div>

</div>

</div>
</div>
</font></div>
</div>

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[email-masked]

--===============3360141091146332910==--

---

From: Harold Manifold via Healeys <[email-masked]>
Date: Mon, 9 Aug 2021 08:50:00 -0700

--===============8308582690336966002==
Content-Transfer-Encoding: quoted-printable

<html xmlns:o=3D"urn:schemas-microsoft-com:office:office" xmlns:w=3D"urn:sc=
hemas-microsoft-com:office:word" xmlns:m=3D"http://schemas.microsoft.com/of=
fice/2004/12/omml" xmlns=3D"http://www.w3.org/TR/REC-html40"><head><meta ht=
tp-equiv=3DContent-Type content=3D"text/html; charset=3Dutf-8"><meta name=
=3DGenerator content=3D"Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
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--></style></head><body lang=3DEN-US link=3Dblue vlink=3D"#954F72" style=3D=
'word-wrap:break-word'><div class=3DWordSection1><div><h2>Just when I thoug=
ht I had the answer British Standard Brass comes out of left field. The thr=
eaded output on the transmissions is brass but the output on the angle driv=
e (same thread size) is aluminum or possibly zinc die cast. Tracy Tools has=
 a 3/4&quot; X 26 TPI BSC die for =C2=A310.00 but is it the right one?<span=
 style=3D'font-size:18.0pt'><o:p></o:p></span></h2></div><p class=3DMsoNorm=
al><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><a href=3D"https://www.tracyto=
ols.com/index.php?route=3Dproduct/product&amp;keyword=3Dbsc&amp;product_id=
=3D979">https://www.tracytools.com/index.php?route=3Dproduct/product&amp;ke=
yword=3Dbsc&amp;product_id=3D979</a></p><p class=3DMsoNormal><o:p>&nbsp;</o=
:p></p><p class=3DMsoNormal>Harold<o:p></o:p></p><p class=3DMsoNormal><o:p>=
&nbsp;</o:p></p><div style=3D'mso-element:para-border-div;border:none;borde=
r-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal s=
tyle=3D'border:none;padding:0in'><b>From: </b><a href=3D"mailto:warthodson@=
aol.com">[email-masked]</a><br><b>Sent: </b>Monday, August 9, 2021 8:13=
 AM<br><b>To: </b><a href=3D"mailto:[email-masked]">[email-masked]=
eam.net</a>; <a href=3D"mailto:[email-masked]">[email-masked]</a>; =
<a href=3D"mailto:[email-masked]">[email-masked]</a>; <a href=3D"=
mailto:[email-masked]">[email-masked]</a><br><b>Cc: </b><a href=
=3D"mailto:[email-masked]">[email-masked]</a><br><b>Subject=
: </b>Re: [Healeys] Speedo Drive Thread Size?</p></div><p class=3DMsoNormal=
><o:p>&nbsp;</o:p></p><div><div><p class=3DMsoNormal><span style=3D'font-si=
ze:10.0pt;font-family:"Arial",sans-serif;color:black'><o:p>&nbsp;</o:p></sp=
an></p><div id=3Dyiv8655725873><div><div><p class=3DMsoNormal><span style=
=3D'font-size:12.0pt;font-family:"Comic Sans MS";color:black'>Bob, <o:p></o=
:p></span></p><div><p class=3DMsoNormal><span style=3D'font-size:12.0pt;fon=
t-family:"Comic Sans MS";color:black'>If you had one available, how would y=
ou go about checking the thread angle?&nbsp;<o:p></o:p></span></p></div><di=
v><p class=3DMsoNormal><span style=3D'font-size:12.0pt;font-family:"Comic S=
ans MS";color:black'>Gary Hodson<o:p></o:p></span></p></div><div id=3Dyiv86=
55725873yqt07661><div><p class=3DMsoNormal><span style=3D'font-size:12.0pt;=
font-family:"Comic Sans MS";color:black'><o:p>&nbsp;</o:p></span></p><div><=
p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span style=3D'font-size=
:10.0pt;font-family:"Arial",sans-serif;color:black'>-----Original Message--=
---<br>From: Bob Haskell via Healeys &lt;[email-masked]&gt;<br>To: =
Harold Manifold &lt;[email-masked]&gt;; john harper &lt;ah100tech@gmail=
.com&gt;; Hank Leach &lt;[email-masked]&gt;<br>Cc: [email-masked].=
net &lt;[email-masked]&gt;<br>Sent: Sun, Aug 8, 2021 7:14 pm<br>Sub=
ject: Re: [Healeys] Speedo Drive Thread Size?<o:p></o:p></span></p><div><p =
class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span style=3D'font-size:1=
0.0pt;font-family:"Arial",sans-serif;color:black'>Harold,<br><br>As has bee=
n pointed out in separate emails, there are two standards that <br>include =
3/4&quot; dia with 26 TPI. British Standard Cycle with thread angle <br>of =
60 degrees and British Standard Brass with a thread angle of 55 <br>degrees=
.&nbsp; Since the speedo drive is brass I would suspect the latter, <br>but=
 I don't have one handy to check.<br><br>Cheers,<br><br>Bob Haskell<br>Aust=
in Healey 3000 BN7/BT7 registrar<o:p></o:p></span></p></div></div></div></d=
iv></div></div></div></div></div><p class=3DMsoNormal><span style=3D'font-s=
ize:10.0pt;font-family:"Arial",sans-serif;color:black'><o:p>&nbsp;</o:p></s=
pan></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p></div></body></html>=

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[email-masked]

--===============8308582690336966002==--

---

From: Bob Haskell via Healeys <[email-masked]>
Date: Tue, 10 Aug 2021 10:28:18 -0400

Gary,

Would attempt to use thread gauges and look at the air gap between the 
threads and each gauge.  Could also try a BSC nut, but with the short 
threaded length on the speedo drive and the tolerance of the nut - may 
not be conclusive.

Cheers,

Bob Haskell

On 8/9/21 11:13 AM, warthodson--- via Healeys wrote:
>
> Bob,
> If you had one available, how would you go about checking the thread 
> angle?
> Gary Hodson
>
> To: Harold Manifold <[email-masked]>; john harper 
> <[email-masked]>; Hank Leach <[email-masked]>

[email-masked]